Hello,
  Apart from suing POV for fun, I have a very simple professional need:

I need to display some extruded polygons that lie in a plane, each with its own
height. Each polygon represents the base of a building, and the height is the
height of the building. In other words I wish to display a 3D view of a
district.

I used to program in POV ray about 15 years ago and have not practiced since.
I have a book called Ray Tracing Creations from the Waite Group. Is this still
valid? In any case it doesnt seem to mention polygons (from a cursory
examination).

So I imagine my need is very simple.

Thankyou for your attention.
Henri

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